Method and materials for thermoplastic recording

Abstract

A sheet material including in working relationship with a reducible silver salt a sterically hindered phenol derivative having the following structural formula: ##STR1##

We claim: 
     
       1. A sheet material carrying a layer comprising an admixture of a reducible silver salt and a sterically hindered phenol derivative having the following structural formula: ##STR4## said silver salt being a silver salt of an aliphatic carboxylic acid containing at least 14 carbon atoms. 
     
     
       2. A method for recording and reproducing information comprising the steps of image-wise exposing to ultraviolet or actinic radiation a photosensitive recording element comprising a photodeactivatable reductor capable of reducing a silver salt at elevated temperature, and uniformly heating said exposed element while the same is in intimate contact with an image-forming layer comprising an admixture of a reducible silver salt and a sterically hindered phenol derivative having the following structural formula: ##STR5## said silver salt being a silver salt of an aliphatic carboxylic acid containing at least 14 carbon atoms, and said reductor being a naphthol, a pyrazolin-5-one, an indane-dione-1,3, or an acetoacetonitrile compound, deactivated by said radiation exposure. 
     
     
       3. A sheet material according to claim 1, wherein the silver salt is silver behenate or silverstearate. 
     
     
       4. A sheet material according to claim 1, wherein the phenol derivative is present in said material in an amount of at least 10% by weight with respect to the silver salt. 
     
     
       5. A sheet material according to claim 1, wherein the phenol derivative and reducible silver salt admixture is in a binder layer applied to a paper support. 
     
     
       6. A sheet material according to claim 5, wherein said phenol derivative and silver salt are used in conjunction with a toning agent. 
     
     
       7. A recording process according to claim 2, wherein the silver salt is silver behenate or silver stearate. 
     
     
       8. A recording process according to claim 2, wherein the phenol derivative is used in an amount of at least 10% by weight with respect to the silver salt. 
     
     
       9. A recording process according to claim 2, wherein the sheet material is heated in a temperature range of 50° to 200° C.